Max WERTHEIMER:publishes 'Experimentelle
Studien über das Sehen von Bewegung', Zeitschrift für
Psychologie 61, 161-265 ('Experimental Studies on the Seeing
of Motion'), in which the effect of so-called apparent motion (induced
by stroboscopic presentation) is identified as the phi phenomenon
to stress the psychological reality of the experience in contrast to
the older practice of describing the effect as an illusion or mis-perception..

80 years ago
(1922)

Wolfgang KöHLER appointed Professor
in succession of Carl STUMPF in Berlin (Psychological Institute of the
Berlin University)